Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9369da7edb67ff…

MALICIOUS

PDF

52.3 KB Created: 2020-10-04 17:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 192bcf104ad9e13d35ac8eae2118d441 SHA-1: 2a11b0078fa60ee34740d5ebb27e987d288d678b SHA-256: 6c9369da7edb67ff8f4f074867f11772ecf6b9a7097158674e58541b3534fc6f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=el+umbral+del+bosque+patricio+sturlese+pdf In PDF document text
    • http://files.toolbeltoflearning.com/uploads/1/3/1/3/131383424/luduso.pdfIn PDF document text
    • http://files.nh-ahn.com/uploads/1/3/2/6/132682585/juxewogekefijile.pdfIn PDF document text
    • https://site-1039498.mozfiles.com/files/1039498/51269493843.pdfIn PDF document text
    • https://site-1038409.mozfiles.com/files/1038409/jikizitodogu.pdfIn PDF document text
    • https://site-1039886.mozfiles.com/files/1039886/57974693363.pdfIn PDF document text
    • https://site-1037844.mozfiles.com/files/1037844/belesokir.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/57163716697.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0459d9e8-6c86-49aa-b3ea-3dab4a2f3501/bopeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9315f8-d42b-4d6d-a1fc-132f5a580eaa/muxufitubazitudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4589517f-9b0a-4beb-9937-7aa510b0da91/diganopularolubaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931931bd-533d-436e-9fe4-dd4e6c7a266d/fafebitenoxujibikadojedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe099679-c7ca-47c8-b38f-a3d8a9b15a47/jevomidatemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e5e505-8e7a-4b0c-ab7e-7a5dc4e51446/tajutexelazarodijawuxebib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bed3e67e-37af-4fa5-bea1-6564d019db05/76192440874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5faa16aa-2836-464e-ba03-ad0dc43d818e/punolikoranipagarulini.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C19 5524 bytes
SHA-256: 466c591c5b8fec3b8fa0fea0868dd2c852267d4c57135d0cbd88364207e69ceb
font_01_sfnt_off00009ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC1 11344 bytes
SHA-256: b64948e6877be52dbc245eb265ab9a767f617c909f305b9c799d4438e6c886cb

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